"Beltane or Bealtaine is an ancient Gaelic holiday celebrated around May 1. Historically, this festival was celebrated in Ireland, Scotland and the Isle of Man. There were similar festivals held at the same time in the other Celtic countries of Wales, Brittany and Cornwall. The festival survives in folkloric practices in the Celtic Nations and the diaspora, and has experienced a degree of revival in recent decades.
Wiccans and Wiccan-inspired Neopagans celebrate a variation of Beltane as a sabbat, one of the eight solar holidays. Although the holiday may use features of the Gaelic Bealtaine, such as the bonfire, it bears more relation to the Germanic May Day festival, both in its significance (focusing on fertility) and its rituals (such as maypole dancing). Some Wiccans celebrate 'High Beltaine' by enacting a ritual union of the May Lord and Lady.
Among the Wiccan sabbats, Beltane is a cross-quarter day; it is celebrated in the northern hemisphere on May 1 and in the southern hemisphere on November 1. Beltane follows Ostara and precedes Midsummer." _Wikipedia